<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>实验2_8</title>
		<style>
			.div1 {
				border: none;
				width: 500px;
				height: 50px;
				background-color: darkgray;
				line-height: 50px;
				overfolw: hidden;
			}

			.right {
				float: right;
				line-height: 50px;
			}

			.div2 {
				border: none;
				width: 400px;
				height: 300px;
				background-color: lightblue;
				float: left;
			}

			.div3 {
				border: none;
				width: 100px;
				height: 300px;
				background-color: lightpink;
				float: left;
			}

			.div4 {
				border: none;
				width: 500px;
				height: 50px;
				background-color: darkgray;
				clear: both;
			}
		</style>
	</head>
	<body>
		<div class="div1">信息技术工程学院
			<div class="right">课程查看 登录</div>
		</div>
		<div class="div2">内容</div>
		<div class="div3">侧边栏</div>
		<div class="div4">copyright...</div>
	</body>
</html>